Apparatus for lining pipes with



July 25, 1939. w T TATE Re. 21,164

APPARATUS FOR LINING PIPES WITH CEMENTITIOUS MATERIAL Original Filed April 15, 1952 2 SheetsSheet 1 WILL/19M 77779115 .July 25, 1939. w. T TATE Re. 21,164

APPARATUS FOR LINING PIPES WITH CEMENTITIOUS MATERIAL Original Filed April 13, 1952 P Sheets-Sheet 2 r;5/vrae VY/LL/Fi/ z 77 779 T6 llllllllllllll Reissued July 25, 1939 UNITED STATES PATENT OFFICE 21,164 APPARATUS FOR LINING' PIPES WITH OEMENTITIOUS The spreader riphery thereof.

A float may to follow it gamate cementitious drippings from the dehythan the pipe lining. The mentioned float may be replaced by an end cap which seals the open end of the skirt so that MATERIAL arms may have rearwardly set prongs which neatly but resiliently fit the bore of an unlined pipe.

flush and. even the pipe.

described with reference to the drawings accompanying and forming part of this complete-specification.

Fig. l depictsmore or lessschematically a sectional general arrangement of the apparatus in operation.

Figs. 2 and 3am respectively side and end elevations of one form of foremost guides.

Figs. 4' and 5 are respectively sectional and end elevations of one form of rear-most guides.

Fig. 6 is a part sectional elevation of one form of rear-most guides and spreader.

Figs. 7 and 8 are side and end elevations of a spreader and guide therefor of somewhat modified' construction.

Fig. 9 is an elevation of a spreader and guide therefor particularly useful for the lining of straight pipes.

Figs. 10 and 11 are respectively sectional and end elevations of a spreader and guides of modified construction;

Fig. 12 is a side elevation. of a spreader and modification construction. respectively sectional and end elevation of a cushioned guide roller pedestal, and

Fig. 15 is a sectional view of a dehydraulic spreader having a domed end cap ailixed thereto.

An assembly of the apparatus to line a pipe is made from such parts as" the particular type of arms 24 and the hubs hering concrete pipe (that is bends or straights) require; likewise the distance between the several parts is determined by the type of pipe to be lined and in the case of bends the parts are grouped according to the radius of the pipe to assure that the spreader travels medially through the pipe.

A simple assembly of the apparatus is constituted of a plurality of fore guides l5 and rear guides IE (though the fore guides only may be advantageously used) to the last of which is attached by screwing or maybe by coupling a spreader which may consist of a distributor l1 only or such distributor I1 and a trailing smoother IE or alternatively a float IE or a combination of all three mentioned parts.

The foremost guide has shackle-ring 20 to which is coupled hauling cable 21 having any suitable winching gear (not shown).

The fore guides l5 consist of hubs 23 from which are a plurality of spring radial arms 24 curved to project rearwardly and gradually to a maximum diameter which is less than that of the unlined pipe by Working clearance only. Preferably such guides have four arms (especially for lining bends) for four arms enable pipe fins and like excrescences as those--in a bend-formed in the manufacture of the pipe by the meeting edges of the mold to be avoided. The resiliency of the arms is sufficient to enable them to be forced over any small protuberances in the pipe should any of same be encountered. The radial 23 have their surfaces chamfered or rounded wherever practicable as at 25 and 25 in order to reduce the head resistance thereof. The hubs 23 have orifices 21 therein for the alfixture of shackles or coupling links 28 or of a single link 29 to the rear guides IS.

The rear guides l6 consist of hubs 33 having peripheral screwed orifices therein for the screwed ends 3| of bifurcated arms 32 the limbs 33 of which have bearings therein for the axle pin 34 of a roller 35 having tyre 36 of soft rubber or the like. The roller side faces 31 are rounded as shown to facilitate the removal of adtheretoand the limbs 33 are chamfered to reduce head resistance. The arms 32 may have distance washers 38 of varying thicknesses interposed upon their screwed shanks 3! to accommodate the guides to pipes of different diameters. The hubs 30 have axial screwed orifices therein to take an eyelet bolt 39 or universal shank 40 as the case may be. A universal joint 4! is provided in the connection of two guides such as it one shank 42 being connected to eyelet bolt 39 by nut 43 and shank 40 carrying the rearmost guide and the spreader l1 and also an eyelet bolt 44 (for the connection of a smoother or float if required) by means of nut 45. The nuts 43 and 45 may be of any desired length to enable varying adjustment of the apparatus for pipes of dilferent radii or for other reasons.

In the form of rear guides depicted in Fig. 6 rollers are dispensed with and the guides 46 and 41 are of similar construction to the fore guides l5 previously described with the exception that guide 41 has its arms 48 shaped complementarily to the nose of the distributor 11. In any or all of the constructions described and illustrated a locknut 49 may be incorporated behind the nuts 43 or 45 to enable still finer adjustments thereof. This Fig. 6 also depicts the smoother l8 shackled to the spreader by eyelet bolt 44.

In the construction depicted in Figs. '7 and 3 the spreader is made of two parts 50 and 5| the one screwing within the other as at 52 which enables a skirt or smoother 5! of any desired length being incorporated. The fore part 50 of this spreader is stepped as at 53 and is particularly useful in the lining of lengthy pipes as the abutment shoulder formed by the step facilitates the forward carriage of the surplus concrete.

In the construction depicted in Fig. 9 the spreader is made of two parts 54 and 55 screwed as at 55 and a trailing float l9, this type of spreader being eminently adapted for the lining of straight pipes. The skirt 55 is provided with circumferential orifices 51 which assist in the dehydration of the concrete by infiltration therethrough of the liquid content thereof and also the arms 58 of the guide 59 more or less closely if not contactingly conform to the configuration of the spreader in order to support the weight thereof and assist in maintaining the spreader medially in the pipe.

The trailing float I9 (which may be made of rubber or the like) may be shackled to the spreader but preferably has a screwed orifice to take on one end of a stem '60 which at its other end homes in a support Bl having orifices 62 therein and said support is adapted to screw into the end of the skirt 55 as indicated at 53. Distance pieces 64 are interposed between said support 6i and the float l9.

In the construction shown in Figs. 10 and 11 a spreader 65 has roller guides 66 integrally incorporated therewith. The fore part of the spreader has radial slots 61 which neatly house arms 68 secured by nuts 69 within a cavity 10 in the spreader.

In the spreader shown in Fig. 12 tandem roller guides as 1| are provided. The guides are of similar construction to those earlier described herein and are arranged in tandem to support the weight of the spreader. This arrangement is useful where a heavy spreader is employed.

The arm shown in Figs. 13 and 14 is for use with the several roller guides and/or spreaders hereinbefore described when the pipe to be lined has a rough or otherwise irregular bore and consequently a greater degree of cushioning and /or resiliency is required to enable the guides to freely traverse same. The arm 12 has a shank 13 neatly fitting a cylinder 14 having screwed shank 15 and the shank 13 is furnished with a diametrical pin or keeper 16 whose ends are vertically slidable in slots 11 in the walls of the cylinder- 14. A cushion or buffer 18 of rubber or like resilient material is interposed between the end of the shank 13 and the floor of the cylinder 14.

The spreader sectionally depicted in Fig. 15 has a multiplicity of dehydrator orifices 51 therein and has a domed end cap 84 attached thereto. The shape depicted is for use with curved pipes and is so domed to provide clearance for the infiltration reservoir which said domed portion constitutes in the lining of straight pipes the end cap may be cylindrical or any other desired shape and where the spreader has a lengthy skirt (as that numbered 55 in Fig. 9) said cap may be merely a disc.

In the form of sealing joint for cap and skirt shown the skirt has an interiorly stepped end 85 and the cap 84 has a complementarily stepped end 85. The spreader has a screwed bore 81 within which homes a cap connecting piece 88 screwed as at'89 for the aflixture of a universal joint as 4! or other shackling means, second connecting piece 90 is screwed as at 9| for a nut 92 which clamps the cap B4 on its stepped seating I5 85'. Theinner ends 93 and 9i' of the pieces 88- I and Si] bothhouse within a sleeve QE-"which isof such a length as to ensure thatthe end 96 of the piece 90 does notprotrude suificiently out of the nut 92 as to be likely to contact the pipe lining. The two pieces 88 and 90 have medial bores 9? and 93 respectively and an air duct 99 opening into one or said bores so that in the eventof the spreader and cap becoming full or nearly so the infiltration will discharge from the end 85 instead of preventing further infiltration through the orifices 51.

In workshop use a pipe to be lined as for example that shown in Fig. 1 is rigidly held in the position shown and rubber or leather washers 79 are placed at each end thereof and at the lower end a delivery chute 80 is aflixed by any suitable clamping device. The delivery chute has a feeding chute 8| with a ram 82 or other device to force concrete into a pipe and the other end of the pipe has a finishing guide tube 83 clamped thereto. One end of the cable 2! is first passed through the pipe and made fast to the winching gear and concrete is then fed thereto in sufficient quantity to provide an inert weight of concrete to insure package of same onto the walls of the pipe as the spreader is drawn therethrough. A train of guides and spreader is then coupled to the free end of the cable and the winching gear operated to draw the apparatus through the pipe. The guides ensure that the cable hauling the spreader and also the spreader is travelled centrally through the pipe and the fore portion of the spreader forcibly thrusts the concrete against the pipe walls and forms a lining thereof While the skirt of the spreader further compresses the lining and smoothes same to a finish and to the required diameter. A float such as i 9 is preferably coupled behind the spreader to smooth out and amalgamate with the lining the small amount of cementitious drippings passing through the dehydrator orifices or said orificed spreader is provided with an end cap such as 84.

For the lining of pipes in situ provision is made,

to feed concrete into the pipe at predetermined distances therealong the distance being determined by the speed at which the apparatus can be travelled through the pipe and the volume of concrete that can be forced along the pipe by it.

The several constructions of the different parts constituting this invention that have been described and illustrated have been found to meet most requirements as regards the pipes and the concrete available at the date hereof at applicants place of business before mentioned. But it is to be clearly understood that applicant is not confined to the particular construction described and illustrated for once the invention is understood many variations of the parts or integers thereof may suggest themselves to those skilled in the art to which this said invention appertains. For example the spreader may be cylindrical in shape with but a slightly tapered nosing or any number of guides and/or Spreaders might be advantageously used or the washers 38 may be used in conjunction with any of the roller guides described and illustrated or the dehydration orifices 51 could be used in any type of spreaders or again any or all of the couplings used may be universal couplings or alternatively link shackles. Further although the invention has been described as for lining pipes with concrete it can equally as well be applied to the lining of pipes with any plastic material.

I claim:

1. Improved apparatus for liningi'pipes with plastic cementitious material" constituted of a spreader whose maximum cross; section is of the same size and configuration as the required finished bore of the pipe when" lined and which is increasingly flared from its leading to its trailing ends and which has a plurality of radial dehydrating orifices adjacent said trailing end, a trailing float whose maximum cross section isnot greater than the maximum cross section of said spreader, one or more positioning guides for and connected to said spreader all universally coupled together, and a hauling cable attached to the foremost of said guides.

2. Improved apparatus for lining pipes with plastic cementitious material constituted of a spreader whose maximum cross section is of the same size and configuration as the required finished bore of the pipe when lined and which is increasingly flared from its leading to its trailing ends and which has a plurality of radial dehydrating orifices adjacent said trailing end, an end sealing cap for said spreader whose maximum cross section is not greater than the maximum cross section of said spreader, one or more positioning guides for and connected to said spreader all universally coupled together, and a hauling cable attached to the foremost of said guides.

3. In apparatus for lining pipes, a spreader, a train of spreader guides the last of which is rigidly afiixed coaxially to the spreader, universal Joints coupling said guides together, and means to adjust the distance between said guides substantially as herein described and explained.

4 Apparatus for lining pipes with plastic material comprising a spreader whose maximum cross section is of the same size and configuration as the required finished bore of the pipe when lined and which is increasingly flared from its leading to its trailing ends and which has a plurality of radial dehydrating orifices adjacent said trailing end, a train of spreader guides the last of which is rigidly affixed coaxially to the spreader, universal joints to couple said guides together and means to adjust the distance between said guides.

5. An apparatus for lining pipes in situ with plastic material including a spreader whose maxlmum cross section is of the same size and configuration as the required finished bore of the pipe when lined comprising an elongated conical nose. a flaring hollow skirt secured to the base 01 the nose having a plurality of dehydrating openings therein intermediate the nose and the trailing end of the skirt. a hub on the end of said nose, a universal joint connection on said hub, a plurality of guide arms radiating outwardly from the hub intermediate the nose and universal joint connection and extending rearwardly over the said nose, a chain of guides in axial alignment universally coupled together having a universal joint connection complementary to said universal connection on the hub adapted to couple the chain of guides and spreader together and a hauling cable attached to the foremost guide in the chain.

6. The apparatus as described in claim 3 in which the said last spreader guide affixed coaxially to the spreader comprises a plurality of arms radiating outwardly and rearwardly over the leading end of the spreader.

7. The apparatus as described in claim 3 in which the spreader comprises a hollow skirt with dehydrating openings.

8. The apparatus as described in claim 4, in which the said last spreader guide affixed to the spreader comprises a plurality of flexible guide arms radially projecting from the leading end of the spreader and extending about the spreader toward the said trailing end of the spreader.

9. The apparatus described in claim 1 in which one of said guides is aflixed to the leading end of the spreader and comprises a plurality of flexible arms extending toward the trailing end of the spreader over the leading end thereof.

10. The apparatus described in claim 2 in which one of said guides is affixed to the leading end of the spreader and includes a plurality of elongated flexible arms radiating from the leading end of the spreader and extending rearwardly over the leading end of said spreader.

WILLIAM TAREN TATE. 

